why transformer is giving some humming noise .....?

11 Answers   Electrotherm, JSW,

---

Why Powers are named in MW?

1 Answers  

---

i m in need of current rating chart of heavy duty pvc/xlpe, cu/al cables. can somebody provide me? if yes, plz send me at ashish_patel111@yahoo.com

0 Answers  

---

whether the generating voltage can be made to be transmitted by means of signals to the recieved end or at the consumers end?

6 Answers   TCS,

---

What are the types of control system?

0 Answers  

---

---

Why dnt we generate 5-ph or 7-ph supply like as 3-ph supply

2 Answers  

---

with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....

0 Answers   Divis Laboratories,

---

The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.

6 Answers  

---

explain LED lamps?

1 Answers  

---

Why Lightning arrester used? Can we use piece of iron as a core material of transformer, if No, why? In CRGOSS material what is meaning of cold rolled grain oriented? Why Impegrenation of Transformer is done? Properties of Insulator? what is phase angle? Testing of transformers (Routine & Monthly)?

6 Answers   NTPC,

---

why maintenance batteries used in DG sets not in MAintenance free Batteries.

4 Answers  

---

Classical power system stability was mainly focussed on rotor angle stability but modern power system stability has more focus on voltage stability.Why?

4 Answers  

---